Adding junit-platform dependency

Author: ryanjbaxter

.java-version

@@ -0,0 +1 @@
+17

spring-cloud-openfeign-core/pom.xml

@@ -196,6 +196,11 @@
 			<artifactId>spring-core-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.junit.platform</groupId>
+			<artifactId>junit-platform-launcher</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.security</groupId>
 			<artifactId>spring-security-oauth2-client</artifactId>